[igt-dev] [PATCH i-g-t v3 03/21] lib/igt_fb: Add support for allocating T-tiled VC4 buffers

[Lyude Paul]

Reviewed-by: Lyude Paul <lyude at redhat.com>

On Fri, 2019-01-11 at 10:05 +0100, Paul Kocialkowski wrote:
> This introduces the required bits for allocating buffers with a T-tiled
> disposition, that is specific to the VC4. It includes calculating the
> top-tile width and creating a buffer object with the VC4-specific
> helper. The tiling flag is set to the buffer object so that this can
> be reused for GPU tests if needed later.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> ---
>  lib/igt_fb.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/lib/igt_fb.c b/lib/igt_fb.c
> index 9ecd10b8cde1..73f33a26a81f 100644
> --- a/lib/igt_fb.c
> +++ b/lib/igt_fb.c
> @@ -37,6 +37,7 @@
>  #include "igt_fb.h"
>  #include "igt_kms.h"
>  #include "igt_matrix.h"
> +#include "igt_vc4.h"
>  #include "igt_x86.h"
>  #include "ioctl_wrappers.h"
>  #include "intel_batchbuffer.h"
> @@ -237,6 +238,9 @@ static const struct format_desc_struct
> *lookup_drm_format(uint32_t drm_format)
>  void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
>  			  unsigned *width_ret, unsigned *height_ret)
>  {
> +	if (is_vc4_device(fd))
> +		tiling = fourcc_mod_broadcom_mod(tiling);
> +
>  	switch (tiling) {
>  	case LOCAL_DRM_FORMAT_MOD_NONE:
>  		if (is_i915_device(fd))
> @@ -290,6 +294,11 @@ void igt_get_fb_tile_size(int fd, uint64_t tiling, int
> fb_bpp,
>  			igt_assert(false);
>  		}
>  		break;
> +	case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
> +		igt_require_vc4(fd);
> +		*width_ret = 128;
> +		*height_ret = 32;
> +		break;
>  	default:
>  		igt_assert(false);
>  	}
> @@ -581,6 +590,13 @@ static int create_bo_for_fb(struct igt_fb *fb)
>  			       igt_fb_mod_to_tiling(fb->tiling),
>  			       fb->strides[0]);
>  
> +		goto out;
> +	} else if (is_vc4_device(fd)) {
> +		fb->gem_handle = igt_vc4_create_bo(fd, fb->size);
> +
> +		if (fb->tiling == DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED)
> +			igt_vc4_set_tiling(fd, fb->gem_handle, fb->tiling);
> +
>  		goto out;
>  	}
>  
> @@ -1493,6 +1509,9 @@ static void *map_bo(int fd, struct igt_fb *fb)
>  	else if (is_i915_device(fd))
>  		ptr = gem_mmap__gtt(fd, fb->gem_handle, fb->size,
>  				    PROT_READ | PROT_WRITE);
> +	else if (is_vc4_device(fd))
> +		ptr = igt_vc4_mmap_bo(fd, fb->gem_handle, fb->size,
> +				      PROT_READ | PROT_WRITE);
>  	else
>  		igt_assert(false);
>  
-- 
Cheers,
	Lyude Paul